He expressed his gratitude to Congress President and UPA Chairperson Sonia Gandhi, Prime Minister Manmohan Singh and Defence Minister AK Anthony "without whose support it would not have been possible."
In a statement issued here, the former chief minister said, "It was a long pending demand of hundreds and thousands of ex-servicemen from across the country."
He said there are a number of ex-servicemen in Punjab who will benefit from this move of the central government.
Amarinder said he had personally taken up the case of the ex-servicemen for one-rank-one-pension with the central government, particularly the Prime Minister and the Defence Minister Anthony.
The one-rank-one-pension was also in the election manifesto of the Congress party, he said.
